1 /* 2 * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef RMMD_PRIVATE_H 8 #define RMMD_PRIVATE_H 9 10 #include <context.h> 11 12 /******************************************************************************* 13 * Constants that allow assembler code to preserve callee-saved registers of the 14 * C runtime context while performing a security state switch. 15 ******************************************************************************/ 16 #define RMMD_C_RT_CTX_X19 0x0 17 #define RMMD_C_RT_CTX_X20 0x8 18 #define RMMD_C_RT_CTX_X21 0x10 19 #define RMMD_C_RT_CTX_X22 0x18 20 #define RMMD_C_RT_CTX_X23 0x20 21 #define RMMD_C_RT_CTX_X24 0x28 22 #define RMMD_C_RT_CTX_X25 0x30 23 #define RMMD_C_RT_CTX_X26 0x38 24 #define RMMD_C_RT_CTX_X27 0x40 25 #define RMMD_C_RT_CTX_X28 0x48 26 #define RMMD_C_RT_CTX_X29 0x50 27 #define RMMD_C_RT_CTX_X30 0x58 28 29 #define RMMD_C_RT_CTX_SIZE 0x60 30 #define RMMD_C_RT_CTX_ENTRIES (RMMD_C_RT_CTX_SIZE >> DWORD_SHIFT) 31 32 #ifndef __ASSEMBLER__ 33 #include <stdint.h> 34 35 /* 36 * Data structure used by the RMM dispatcher (RMMD) in EL3 to track context of 37 * the RMM at R-EL2. 38 */ 39 typedef struct rmmd_rmm_context { 40 uint64_t c_rt_ctx; 41 cpu_context_t cpu_ctx; 42 } rmmd_rmm_context_t; 43 44 /* Functions used to enter/exit the RMM synchronously */ 45 uint64_t rmmd_rmm_sync_entry(rmmd_rmm_context_t *ctx); 46 __dead2 void rmmd_rmm_sync_exit(uint64_t rc); 47 48 /* Functions implementing attestation utilities for RMM */ 49 int rmmd_attest_get_platform_token(uint64_t buf_pa, uint64_t *buf_size, 50 uint64_t c_size); 51 int rmmd_attest_get_signing_key(uint64_t buf_pa, uint64_t *buf_size, 52 uint64_t ecc_curve); 53 54 /* Assembly helpers */ 55 uint64_t rmmd_rmm_enter(uint64_t *c_rt_ctx); 56 void __dead2 rmmd_rmm_exit(uint64_t c_rt_ctx, uint64_t ret); 57 58 /* Reference to PM ops for the RMMD */ 59 extern const spd_pm_ops_t rmmd_pm; 60 61 #endif /* __ASSEMBLER__ */ 62 63 #endif /* RMMD_PRIVATE_H */ 64